Renal Multidector Row CT

Multidetector—(also known as multislice, multichannel, or multisection)—CT (MDCT) is the most recent advance in CT technology. It uses a multiplerow detector array instead of the single-row detector array used in helical CT. These new CT scanners, with reduced gantry rotation times (0.5 s or less for one 360 rotation), allow 2 to 25 times faster scan times than helical CT with the same or better image quality. These faster scan times result in decreased breath-hold times with reduced motion artifact and more diagnostic images. Increased volume coverage is combined with thinner slice thickness to obtain better quality volume data sets for workstation analysis, either in 2-D axial, multiplanar reformation (MPR), or three-dimensional (3-D) imaging. Moreover, by using MDCT, different image thickness can be obtained from the same acquisition data set.
Helical noncontrast CT is used widely for evaluation of the kidneys and urinary collecting system, especially to detect urinary calculi. MDCT allows images to be obtained in multiple phases of renal parenchymal enhancement and excretion in the collecting system after administration of a single bolus of intravenous (IV) contrast material. Therefore, detection and characterization of small renal masses, display of the arterial and venous supply of the kidney similar to conventional angiography, and demonstration of the collecting system’s abnormalities using different 3-D display techniques are possible with MDCT. This review discusses the advantages, techniques, and clinical value of MDCT in kidney imaging.
Advantages of multidetector row CTThe main advantages of MDCT are faster scanning  time, increased volume coverage, and improved spatial and temporal resolution. These advantages also result in an increased number of slices obtained within a certain amount of time, which depends on the number of rows or channels.
Increased number of slices
As MDCT uses multiple rows of detectors, it allows for registration of more than one channel per gantry rotation, whereas single-detector helical CT allows registration of only one channel of image information of the scanned body part per gantry rotation. The number of slices obtained per unit time depends on the scanner’s number of rows (or channels) and on the gantry rotation time. The number of slices obtained per second can be as many  as 38 for a 16-slice CT with a 0.4-second rotation time.
Increased temporal resolution
Current MDCT scanners have a very fast gantry rotation time that is equal to or less than 0.4 seconds. This reduced examination time creates advantages, especially in examinations affected by voluntary or involuntary patient motion, such as pediatric, geriatric, trauma, and cardiac studies. Decreased gantry rotation time provides reduced scanning times and increased coverage along the z-axis. Therefore, image acquisitions in multiple phases of renal parenchymal enhancement and contrast excretion in the collecting system after administration of a single bolus of IV contrast media are possible.
Isotropic data acquisition and increased spatial resolution
Isotropic data acquisition is defined as obtaining images with equal voxel size in three axes. MDCT scanners permit acquisition of thin sections with isotropic voxel size. Their effective section thickness is between 0.75 and 1.6 mm. MDCT scanners permit reconstruction of images at various thicknesses different from that chosen before the scan. Isotropic imaging minimizes the importance of patient positioning and obviates obtaining axial, coronal, and sagittal planes directly. Increased temporal resolution and acquisition of thin slices with isotropic voxel allows excellent quality MPR images to be obtained and 3-D rendering of virtually any plane. Optimal imaging of the renal hilar anatomy requires small slice widths and isotropic or near-isotropic MDCT data sets.

Artikel Terkait

Renal Multidector Row CT
4/ 5
Oleh

Berlangganan

Suka dengan artikel di atas? Silakan berlangganan gratis via email

This below all content of radiology information

Neuroradiology Musculoskeletal radiology MRI Musculoskeletal MRI Abnormal Mri Brain X-RAY differential diagnosis Head Neck Anatomy mnemonic CT Teleradiology Radiology News Radiology chest musculoskeletal salary pediatrics ultrasound ultrasound images job Brain tumour interventional radiology abdomen CT Abdomen with contrast DAMS Imaging radiology ramblings residency c nature pediatric radiology random ramblings xray Radiology Top basics body imaging guide procedure web 2.0 Apk Android C T Chest X Ray Interpretation Teleradiology Providers head and neck radiology video Fun b cancer chest radiology salary 1 CXR GenitoUrinary ORTHOPEDICS Sonographic Measurements Stroke Ultrasound Hepatitis dams md/ms coaching mammography radiology business tuberculosis BRAIN Clinicoradiological series FETUS GI radiology Gastrointestinal x ray Radiology 4 Radiology Conferences Radiology Images Telemedicine UPPER LIMPS Ultrasound in Emergencies dynamic MRI lifestyle radiology links renal case spine 3 tesla MRI Dams clinicoradiological series Entrepreneur Gastrointestinal Tract Images Literature Liver abscess ultrasound MD/MS coaching Radiology 40 Radiology Imaging Radiology Journal Radiology PDF Radiology mcqs Ultrasound Technique blog bone tumour cardiac CT career cerebral venous thrombosis chest xray d fracture gadolinium gastrointestinal genitourinary radiology hepatobiliary imaging lipoma medical blogs mri lower abdomen pelvis psychiatry radiation concern social networking technology training urogenital imaging weblog 3D CT Arachnoid cyst CT Cardiac Diploma Guid Equipment Cost FDA Fibrous dysplasia Interventional Ultrasound Guiding Biopsi MDCT MR Pancreas MRI Vertebrae MRI Vertebrae lumbal MRI contrast MRS RTA Radiology Teaching resource TB Hip TECHNIQUE Tech Thorax X Ray Upper Ext aiims ankle sprain bowel cancer brain abscess case study computers and radiology contrast ependymoma epidermoid facebook guest post internet journal of radiology iphone kienbock disease liver liver segments ct locum tenens mri abdomen multislice CT pericallosal lipoma plain film teaching files private practice radiology humour shoulder arthrogram shoulder dislocation small bowel social media trigeminal neuralgia tuberous sclerosis venous x ray Vertebrae 3d printing 7 tesla MRI ACL reconstruction ACL tear ACLS AIIMS nov 2008 ALPSA lesion ANGIOGRAPHY ATFL B12 deficiency BLS BOLD Breast imaging Breast imaging Mammography CHF CT Paranasal CT Scanner Price CT angiography CT coronary angiography CT technology CV junction CXR teaching files Carcinoid Chest X Ray Contrast Agent Creutzfeldt-Jakob Disease Dams MD/ms Dams grand rounds Diffusion weighted imaging Dysmenorrhea E E World Award 2011 EYE Embolization Imaging Entrepreneurship FMG India FMGE FNH Focal liver lesions ultrasound Focal nodular hyperplasia GBM GI Gall bladder Glioblastoma multiforme Glomus jugulare HEAD HEART HRCT HSG Head injury ICA dissection IRIA 2011 IUGR IVC filter Iliotibial Band Friction Syndrome Job Info Kidney Cancer LV thrombus Leptomeningeal cyst MAMOGRAPHY MCI Screening MD MPPG MR mammography MR urography MRA MRCP MRI Cervical MRI update MRI/PET MRV Mesenteric ischemia Middle East respiratory syndrome coronavirus (MERS-CoV) Motor neuron disease NECK Normal Liver US Oncology trial PDF Radiology PM and R Physician PNS Partial anomalous pulmonary venous drainage Persistent trigeminal artery Pg entrance Physiatrist Physiatry Physician Assistant Plastic Surgery Price MRI Machines 2017 Pulmonology Pulvinar sign Radiology Price List Radiology Today Radiology Updates Radiology grandrounds Radiology images of GI Tract Renal Ultrasound Retinal Surgery Rheumatology Ryles tube SKULL Seizure Sellar Masses Sleep Medicine Sports Medicine Subdural hematoma Surgery TBM TRIANGULAR FIBROCARTILAGE COMPLEX Trauma Surgery URI Ultrasound HIV Umbilical vein Update Article Upper Extremity X Ray Urology Usmle VHL Vascular Surgery Veteran Affairs X Ray Head about accessory bone acute cerebillitis acute pancreatitis aiims may 2011 aipg ankle ankle fracture apple articular cartilage aspergilloma atherosclerosis avulsion injury awards bankart lesion basilar artery thrombosis bilateral phaeochromocytoma biopsy bipolar bohler's angle bone tumours brachial plexus brain tb brainstem stroke branchial cyst breast cancer screening buford complex business today calcaneal fracture calcium scoring canned reports carcinoma esophagus carcinoma stomach cardiac ct/pet cardiac pacemaker cardiogen 82 cardiothoracic imaging catrotid artery dissection cavernoma cervical lymphnode levels chest radiographic score chest radiographs choledocolithiasis classification cloud computing cochlear implant colloid cyst communication in radiology compare case concha bullosa congenital brain anomalies congenital heart disease coronary CT coronary artery disease corpus callosum agenesis craniopharyngioma cryptococcal meningitis ct abdomen and pelvis cystic renal disease dams usmle dams visual treat deep brain stimulator dengue dengue hemorrhagic fever developmental dysplasia devices diagnostic imaging dialysis diffusion MR imaging diffusion tensor imaging diffusion tractography digital radiography distal facial neuroma dsa duplication gall bladder echinococcus echocardiography ectopic kidney elearning elevated diaphragm epilepsy esop facial neuroma fibular osteosarcoma functional mri gastrointenstinal tuberculosis germinoma gifts glioma google google plus gun shot injury haemangioblastoma health 2.0 healthcare consultancy hemangiblastoma hemophilia hippocampus hirayama disease hydatid cyst hypercoagulable hypoxic ischemic encephalopathy indian conferences inferior rectus anomaly infrared interior tomography interstitial lung disease intramedullary metastates intramedullary tuberculomas ipad ipad 2 jacoud's arthropathy kernohan's notch knee kohler's disease krukenberg tumour laceration leber's optic atrophy liver transplant lung contusion lymphatics macros marchifava bingami disease mastoiditis maxillary sinus mucocele medial malleolus ossicle medial tibial stress syndrome medical writting medicare medicolegal aspects of teleradiology migraine mortality motor area mri knee mri lumbal msk penang course mucinous cystadenoma multicentric Glioblastoma multiforme mycotic pseudoaneurysm of superficial temporal artery nephrogenic systemic fibrosis nephrology neurosurgery meets nonradiologist oesophagus olecranon spur online medical games open access opercular syndrome opinion orbit os odontoideum os radiale externum osirix osteochondritis osteochondroma osteoid osteoma outsourcing radiology ovarian tumour parameniscal cyst paranasal sinuses parotid vascular mass patellar sleeve avulsion fracture patent ductus arteriosus patent foramen ovale patient information pelvic MRI pericardial fat phaeochromocytoma pharmaceutical writting pineal tumour placenta accreta placenta increta placental insufficiency pneumococcal pneumonia polycystic kidney disease portal Hypertension posterior circulation stroke power point presentation primary complex protected health information pseudobulbar palsy pseudomyxoma peritonei publications pulmonary edema pulmonary embolism pulmonary tuberculosis rabbit ear sign rad radiographic deterioration pattern radiography radiolo radiologist blogs radiology city radiology debate radiology images of spleen radiology intervensional radiology learning radiology search engine radiology spotter radiology spotters radiolopolis raditudes rathke cleft cyst renal imaging renal sinus tumour right sided aortic arch robot round cell tumour sacral agenesis scaphoid fracture schatzki ring scientific content screening search engine secondaries secondary ossification centres silicosis social radiology soft tissue chondroma solitary pulmonary nodule spectroscopy spinal arachnoid cyst spinal cord tumours spinal osteochondroma spine tumour spinoglenoid cyst sternal tuberculosis stress fracture sacrum stroke mri sub-acute combined degeneration subclavian pseudoaneurysm subependymal giant cell astrocytoma sumer sethi swyer-james syndrome syringomyelia tb teaching video teleradiolo teleradiology business models teleradproviders teleultrasound temporal bone fracture tendoachilles testicular tumour tethered cord. MRI tibial stress fracture total knee arthroplasty total shoulder replacment trachea. tracheal diverticulum tracheal stenosis tracheomalacia traumatic lung cyst triceps tear triquetral fracture tubercular abscess tuberculoma tuberculosis elbow ultrasound image of The segments of the liver umblical artery doppler uroradiology vascular malformation vasovist venous angioma ventriculitis video ct scan video mri viral encephalitis vitamin deficiency